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Delphi Programming question

Posted on 1997-09-11
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Last Modified: 2011-04-14
I want to play the same wav file over and over again,
without accessing the hard disk over and over again.
The length of this file is 1/400 minute, and I want
to play it 400 times a minute without reloading it
from HD. Time is critical here.

Someone said I should use streams: far to complex
to find out on my own.

Can someone give a working example.

1) must run under delphi 2.0
2) the start of the repeating playing must be controlled
(be started) by pressing a Tbutton
3) same for the end
4) the speed (that is when the next repeation is starting
must be variable
5) It must not be a component, but code which can be
inserted in the mainform

Thanks
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Question by:luiaard
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6 Comments
 
LVL 1

Expert Comment

by:Zonnald
ID: 1344681
luiaard,

the media player can loop if you make the notify event start the player again but this seems to cause a delay.
You really need to somehow build a data structure that contains the wave I will play with it when I can - interesting idea though

Zonnald

0
 
LVL 3

Expert Comment

by:mirek071497
ID: 1344682
this example can help you

var m : TMemoryStream;
begin
  m := TMemoryStream.Create;
  m.LoadFromFile( 'D:\TEST.WAV' );
  sndPlaySound( m.Memory, SND_MEMORY );
  m.Free;
end;
0
 

Author Comment

by:luiaard
ID: 1344683
Thanks Mirek, but I reject your answer because I get:

Undeclared identifier sndPlaySound
Undeclared identifier SND_MEMORY
Could not compile TEST.PAS

What am I doing wrong?
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LVL 3

Expert Comment

by:mirek071497
ID: 1344684
uses
  MMSystem;
0
 

Author Comment

by:luiaard
ID: 1344685
Mirek, it works.
Send in your last comment again please, but make
 it an answer.  Then I will grade it as excellent.

With regards,
Luiaard
0
 
LVL 3

Accepted Solution

by:
mirek071497 earned 100 total points
ID: 1344686
happy programming to you.
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